* {
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
    font-size: 18px;
}

a {
    color: inherit;
}
a:hover {
    opacity: 0.7;
}

h1 {
    font-size: 2.8em;
}

h1 a {
    text-decoration: none;
}

h2, h3 {
    font-size: 1.4em;
    margin: 0;
    display: inline-block;
    padding: 0.5rem 1rem;
    vertical-align: top;
}

h2 {
    background-color: aquamarine;
}

.mark {
    background-color: gainsboro;
}
.mark a {
    text-decoration: none;
}

article {
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.2em;
    padding-left: 1rem;
    line-height: 1.3em;
    max-width: 36rem;
    color: dimgray;
}

em {
    font-style: normal;
    font-weight: bold;
}

/* Form */

label {
    display: block;
}

button,
textarea,
input {
    font-size: inherit;
    min-height: 2.5em;
    padding: 0 1rem;
}

input[type="text"],
textarea {
    width: 100%;
}

textarea {
    padding: 0.5rem 1rem;
    font-family: sans-serif;
}

button,
input[type="submit"] {
    margin: 0 1rem 2px 1rem;
    cursor: pointer;
    font-weight: bold;
    min-width: 8rem;
}

/* Day coloring */

.Saturday,
.Sunday {
    background-color: lightsalmon;
}
